Culvert-mold.



verts are formed.

lll ld ldlld@ STATES PATENT I(rlilORC-rE H. CAVIL, OF WEST DE PERE, WISCONSIN.

CULVERT-MOLD.

weaves.

Application led June 26, 1616.

To all whom t may concern.'

Be it known that l. Gnonon H. CAVIL, a citizen of the United States, residing at fest De Pere, R. F. D. No. l, in the county of Brown and State of Vlisconsin, have invented certain new and useful lmprovements in Culvert-ll/lolds, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention relates to molds and especially to cores around which concrete cul- The practice hitherto adhered to when forming culverts around cores consists in breaking up and destroying the core after the culverts have set, and in some instances the core consisting of wood was left in the cast to gradually decay. This method isrhighly objectionable, as the core may be only used once, thus rendering the casting of culverts extremely expensive and, besides, the remaining core often prevents the fluid from freely flowing through the culverts.

To obviate these disadvantages the present invention provides a core which may be conveniently and readily assembled and collapsed for continued use.

A further object consists in making the parts of the mold simple, durable, and of inexpensive construction.

Another object aims at such 'construction of the parts that they may be readily adapted to different sizes of culverts to be cast.

With these and other objects in view the invention consists of the novel arrangement and construction of parts as described in the specification and specifically pointed out in the appended claims. ln the accompanying drawing,

Figure l indicates an end View of ak square culvert with the core arranged therein.

Fig. 2 is a longitudinal sectional view taken through the center of the culvert, and showing parts of the core in section.

Fig. 3 is a perspective view of a brace board.

Fig. 4 is a perspective view of a wedge plate, and

Fig. 5 is a perspective view of the key plank or board.

Referring to the drawing, the core indicated in Figs. l and 2 is of square crosssection and is made up of the vertical wooden planks l, 2, of the bottom plank 3, and of the top parts 4, 4 at the sides Specification of Letters Patent.

Patented May l5, i917.

sei-iai No. 105,920.

thereof abutting the intermediate parts 5.

rlhe wooden planks or boards are of a length equal to the length of the culvert,

but in such cases whore extraordinary long culverts are to be formed the length of the wooden planks is made up of sections which abut each other. By reference to Fig. l it is obvious that parts l and 3 are identically shaped, having a square end at one side, while the other end has a beveled corner 3a. The side pieces 4, 4 at the top of the core structure are similar in form and are provided with beveled edges with a slant directed downwardly and outwardly. rlhe edges of the intermediate part 5 are correspondingly beveled which thus forms a key plank which has to be supported in operative position. rlhis is effected by means of brace boards 6 of a length slightly less than the inside width of lthe core. The brace boards 6 are equipped with cleats 7 integral therewith or fastened thereto, which stop short of the ends of the brace pieces 6. Wedge plates 8 maintain the brace boards 6 at the bottom and at the top of the core structure in separate relation.

lfhen assembling the core the parts l, 2, and 3 are held in the position indicated in Fig. l, and the brace boards 6 are laid on the bottom plank 3, care being taken that one board 6 overlaps the joint of contiguous bottom planks where more than one section are employed. plates 8 are then applied in vertical position engaging with their sides the sides of the flanges l and 2, respectively. Thereupon the upper brace boards are placed upon the wedge plate 8 and the parts 4, 4, and 5 are applied in the position indicated in Fig. l. ln order to hold the parts of the core structure in position, wire, cord, or the like (not shown) is wound around the structure and the culvert may then be cast. After the culvert has become set the core structure is removed by collapsing the same. This is eected by imparting a series of blows to one side of the wedge plates 8. By reference to Fig. 2 it is obvious that all the wedge plates 8 have their slanting edges directed toward one end of the culvert. Upon removal of the wedge plates 8 the upper brace boards 6 fall to the bottom for want of support and simultaneously the key plank 5 leaves its operative position, whereby the parts 4, 4 maintain a gap from each other. To remove the latter parts it is only necessary to slightly move the same inwardly, whereupon they will readily fall by virtue of the beveled corner la which permits the turning movement of the parts preparatory to falling downwardly. F rom the foregoing it is obvious that the core structure may be readily collapsed after the culvert is formed and set, and that the parts of the core structure may be employed continuously. Attention is called to the fact that the same wall pieces may be used for all sizes of culverts, and for larger sizes additional planks are used of the required width and length,

` which abut the square edges of the planks l,

2, and 3. ln addition, special pieces are inserted between the key plank 5 and the plank L in order to complete the required square. However, the boards 6 and S are special for each size of culvert.

The drawing depicts the preferred embodiment of the invention, but it is understood that changes and alterations of the parts may be made within the scope of the invention as pointed out in the appended claims.

I claim:

l. A culvert mold including planks form ing the sides and bottoni respectively, a pair of planks of less width than the first named planks forming part of the top and having beveled edges at their inner sides, a key plank engaging with beveled edges the beveled edges of said top forming planks, brace pieces at the top and bottom, and wedge plates engaging said brace pieces.

Copies of this patent may be obtained for five cents 2. A culvert mold including planks forming the sides and bottom respectively, a pair of planks of less width than the rst named planks forming part of the top and having beveled edges at their inner sides, a key plank engaging with beveled edges the bev eled edges of said top forming planks, brace pieces of a length less than the inside width of the mold, cleats formed on said brace pieces and wedge plates fitting between said cleats and the side forming planks, substantially as described.

3. A core structure comprising bottom, sides, and top forming planks, said top forming plank being divided longitudinally to form side and intermediate' sections, the said sections being formed with beveled outer corners, brace pieces at the top and bottom, and wedge plates engaging said brace pieces.

il. A core structure of the kind set forth comprising bottom, sides, and top forming planks, said top forming plank embracing longitudinal sections at the ends having beveled inner and outer edges, and an intermediate section engaging the beveled inner edges of said longitudinal sections, said longitudinal sections resting on said side forming planks, brace pieces at the top and bottom, cleats formed on said brace pieces, and wedge plates fitting between said cleats and the side forming planks.

ln testimony whereof l hereunto affix my signature.

GEORGE H. CAVIL.

each, by addressing the Commissioner of Patents,

Washington, D. C. 

